Method for manufacturing biogas and organic fertilizer by straw

A technology of organic fertilizer and straw pulverizer, applied in the direction of organic fertilizer, fertilizer made of biological waste, sewage/sludge fertilizer, etc., can solve the problem that biogas residue and biogas slurry are not well utilized, limit the application of biogas engineering and Promotion, secondary pollution resources and other issues, to achieve the effect of facilitating the formation of soil aggregate structure, facilitating the use of anaerobic microorganisms, and increasing the methane content

Inactive Publication Date: 2012-01-18
雷震
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the low dry matter content in wet fermentation, the energy used to maintain the temperature of the reaction system is largely occupied by solvent water, especially in the north, more than 30% of the energy is consumed for system in

Method used

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  • Method for manufacturing biogas and organic fertilizer by straw
  • Method for manufacturing biogas and organic fertilizer by straw
  • Method for manufacturing biogas and organic fertilizer by straw

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0046] Example 1:

[0047] (1) Pretreatment of straw:

[0048] ①Stalk crushing:

[0049] The straw is crushed by a straw crusher, and the length of the crushed straw is 20mm.

[0050] ② Straw wetting:

[0051] Wet the crushed straw with water in a ratio of 1:1, turn the straw while adding water to ensure even wetting; after wetting, place the straw for 24 hours to allow the straw to fully absorb water.

[0052] ③The mixing of raw materials:

[0053] Add compound fungus and ammonium bicarbonate to the moistened straw while stirring and mix well. At the same time, add water. The amount of water added is twice the weight of the straw to make the straw moisture content 60%; the compound fungus is added to the crop straw 0.25% of the mass, the amount of ammonium bicarbonate added should ensure that the C / N of the fermentation broth is 25:1;

[0054] (2) Straw stacking:

[0055] The wet straw is collected in a pile with a height of 1m. Use sharp wooden sticks to perforate the top and the periph...

Example Embodiment

[0061] Example 2:

[0062] (1) Pretreatment of straw:

[0063] ①Stalk crushing:

[0064] The straw is crushed by a straw crusher, and the length of the crushed straw is 20mm.

[0065] ② Straw wetting:

[0066] Wet the crushed straw with water in a ratio of 1:1, turn the straw while adding water to ensure even wetting; after wetting, place the straw for 24 hours to allow the straw to fully absorb water.

[0067] ③The mixing of raw materials:

[0068] Add compound fungus and ammonium bicarbonate to the moistened straw while stirring and mix well. At the same time, add water. The amount of water added is twice the weight of the straw to make the straw moisture content 55%; where the compound fungus is added to the crop straw 0.15% of the mass, the amount of ammonium bicarbonate added should ensure that the C / N of the fermentation broth is 25:1.

[0069] (2) Straw stacking:

[0070] The wet straw is collected in a pile with a height of 1.5m. Use sharp wooden sticks to perforate the top and th...

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Abstract

The invention relates to the technical field of renewable energy resources, and especially relates to a method for manufacturing biogas and organic fertilizer by straw. The invention comprises the following steps of: (1) straw pretreatment; (2) straw retting; (3) anaerobic fermentation; (4) utilization of fermentation products. The invention significantly increases the degradation rate and biogas yield of straw, stabilizes the pH value of the fermentation system by combining with the bactericide pretreatment, facilitates the normal proceeding of anaerobic fermentation, and thus increases the methane content in the biogas. The invention greatly saves cost, and has almost no sewage discharge; the utilization rate of renewable energy resources is increased; the biogas produced by crop straw anaerobic fermentation is treated by purification procedures of desulphurization and dehydration, and thus can be used as fuel for resident cooking or for power generation; on the other hand, residues produced by straw anaerobic fermentation are separated into biogas residues and biogas slurry which can be prepared into solid and liquid organic fertilizer, and the organic fertilizer is easy to be absorbed by crops, and can greatly increase the comprehensive utilization rate of straw resources.

Description

technical field [0001] The invention relates to the technical field of renewable energy, in particular to a method for producing biogas and organic fertilizer from straw. Background technique [0002] my country is a large agricultural country, with very rich crop straw resources such as wheat straw, rice straw, bean stalk, and corn stalk. It has been fully developed and utilized, and the treatment method in many places is incineration, which not only fills the air with smoke, affects air and land traffic, but also causes serious air pollution, and is also a huge waste of biomass resources. On the other hand, due to the long-term use of chemical fertilizers and pesticides in large quantities in the vast rural areas of our country, the air permeability and porosity of the soil are greatly reduced, the soil agglomeration is serious, and the soil environment for crop growth has been greatly damaged. If chemical fertilizers are used for a long time, it is bound to be serious. Af...

Claims

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Application Information

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IPC IPC(8): C12P5/02C05F5/00C05F7/00
CPCY02E50/343Y02A40/20Y02E50/30Y02P20/133Y02P20/59Y02W30/40
Inventor 雷震张小平田秀财王彬
Owner 雷震
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